How to keep a reversible figure from reversing: Teasing out top-down and bottom-up processes
How to keep a reversible figure from reversing: Teasing out top-down and bottom-up processes
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DOI：
10.1068/p5630
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发表时间：
2007-01-01
期刊：
影响因子：
1.7
通讯作者：
Moran, Cindy J.
中科院分区：
文献类型：
--
作者：
Long, Gerald M.;Moran, Cindy J.
我们通过两个实验来检验我们对可逆图形感知的过程本质，这些实验调查了先前暴露条件对观察者图形逆转报告的影响。在实验1中，观察者在几分钟内适应了一个明确的版本的旋转内克尔立方体之前，提出的标准模糊的数字。结果表明，适应产生了立即偏见，认为模糊的数字在相反的配置（即反向偏见），并减少报告的逆转在测试期间。在适应期和测试期之间引入短暂的延迟表明，这种偏倚是一种高度短暂的效应，只有当适应和测试数据在大小上匹配时才明显。在实验2中，观察者在呈现标准模糊图形之前，先用一个明确的图形刺激几秒钟。在这种情况下，所获得的偏差强烈支持观察者报告模糊图形与适应图形处于相同的配置（即正偏差）;并且引入延迟期或改变图形大小都没有任何影响。我们的结论是，这些实验揭示了不同的作用，短暂的，retinally本地化的神经过程，以及更稳定的，全球性的过程在指定的条件下。
The nature of processes underlying our perception of reversible Figures was examined through two experiments investigating the effects of prior exposure conditions on an observer's report of figural reversal. In experiment 1, observers were adapted over several minutes to an unambiguous version of a rotating Necker cube prior to the presentation of the standard ambiguous figure. Results indicated that adaptation produced an immediate bias to perceive the ambiguous figure in the opposite configuration (ie reverse bias) and to reduce reports of reversal over the test period. The introduction of a brief delay between the adaptation and test periods revealed that this bias is a highly transient effect and is only clearly evident when the adaptation and test figures are matched in size. In experiment 2, observers were primed with an unambiguous figure for a few seconds prior to the presentation of the standard ambiguous figure. In this case, the obtained bias strongly favored the observer's reporting the ambiguous figure to be in the same configuration as the adapting figure (ie positive bias); and neither introducing a delay period nor changing figure size had any effect. We conclude that these experiments reveal the distinct roles of transient, retinally localized neural processes as well as more stable, global processes under specifiable conditions.